body, html
    line-height: 1
    font-weight: 200
    font-family: 'PingFang SC','STHeitiSC-Light',Arial, Helvetica, sans-serif

.clearfix
    display inline-block
    &:after
        display: block
        content: ''
        height 0
        line-height: 0
        clear both
        visibility hidden

@media (-webkit-min-device-pixel-ratio: 1.5),(min-device-pixel-ratio: 1.5)  
   .border-1px  
       &::after  
          -webkit-transform: scaleY(0.7)  
          transform: scaleY(0.7)  
  
@media (-webkit-min-device-pixel-ratio: 2),(min-device-pixel-ratio: 2)  
   .border-1px  
       &::after  
          -webkit-transform: scaleY(0.5)  
          transform: scaleY(0.5)